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प्रश्न
Answer the following question:
Which element of the first transition series has highest second ionisation enthalpy?
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उत्तर
Out of all the elements of the first transition series copper has the highest second ionisation enthalpy.
Electronic configuration of Copper is: \[\ce{3d^10 4s^1}\]
After the Loss of first electron from the 4s copper acquires \[\ce{3d^10}\] configuration which is stable. Therefore, removal of second electron from the field 3-D orbital is very difficult and requires high amount of energy.
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संबंधित प्रश्न
Account for the following:
Mn shows the highest oxidation state of +7 with oxygen but with fluorine, it shows oxidation state of +4.
The elements of 3d transition series are given as: Sc Ti V Cr Mn Fe Co
Answer the following: Write the element which shows maximum number of oxidation states. Give reason.
In the series Sc (Z = 21) to Zn (Z = 30), the enthalpy of atomization of zinc is the lowest, i.e., 126 kJ mol−1. Why?
Which of the 3d series of the transition metals exhibits the largest number of oxidation states and why?
Explain briefly how +2 state becomes more and more stable in the first half of the first row transition elements with increasing atomic number?
What are alloys?
Why do transition metals exhibit higher enthalpy of atomization?
Explain why Zn2+ salts are white whereas Cu2+ salts are coloured.
Explain why Mn2+ is more stable than Fe2+ towards oxidation to +3 state. (At. no. of Mn = 25, Fe = 26)
Which among the following transition metal has the lowest melting point?
The magnetic moment is associated with its spin angular momentum and orbital angular momentum. Spin only magnetic moment value of Cr3+ ion is ______.
Why is \[\ce{HCl}\] not used to make the medium acidic in oxidation reactions of \[\ce{KMnO4}\] in acidic medium?
Which of the following ions show higher spin only magnetic moment value?
(i) \[\ce{Ti^3+}\]
(ii) \[\ce{Mn2+}\]
(iii) \[\ce{Fe2+}\]
(iv) \[\ce{Co3+}\]
Match the properties given in Column I with the metals given in Column II.
| Column I (Property) | Column II (Metal) | |
| (i) | An element which can show +8 oxidation state | (a) \[\ce{Mn}\] |
| (ii) | 3d block element that can show | (b) \[\ce{Cr}\] |
| upto +7 oxidation state | (c) \[\ce{Os}\] | |
| (iii) | 3d block element with highest melting point | (d) \[\ce{Fe}\] |
Mention the type of compounds formed when small atoms like H, C and N get trapped inside the crystal lattice of transition metals. Also give physical and chemical characteristics of these compounds.
A metallic ion 'M' reacts with chloride ion to form white precipitate which is readily soluble in aqueous ammonia. Identify 'M'?
Which one of the following characters tie of the transition metal is associated with higher catalytic activity?
Why are all copper halides known except that copper iodide?
Give reasons for the following statement:
Zn, Cd, and Hg are soft metals.
Account for the following:
Copper has an exceptionally positive `"E"_("M"^(2+)//"M")^0` value.
